001/** 002 * Copyright 2015 DuraSpace, Inc. 003 * 004 * Licensed under the Apache License, Version 2.0 (the "License"); 005 * you may not use this file except in compliance with the License. 006 * You may obtain a copy of the License at 007 * 008 * http://www.apache.org/licenses/LICENSE-2.0 009 * 010 * Unless required by applicable law or agreed to in writing, software 011 * distributed under the License is distributed on an "AS IS" BASIS, 012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 013 * See the License for the specific language governing permissions and 014 * limitations under the License. 015 */ 016package org.fcrepo.kernel.impl; 017 018import static org.fcrepo.kernel.impl.utils.FedoraTypesUtils.isNonRdfSourceDescription; 019import static org.modeshape.jcr.api.JcrConstants.JCR_CONTENT; 020import static org.slf4j.LoggerFactory.getLogger; 021 022import org.fcrepo.kernel.exception.RepositoryRuntimeException; 023 024import javax.jcr.Node; 025import javax.jcr.RepositoryException; 026 027import org.fcrepo.kernel.models.NonRdfSource; 028import org.fcrepo.kernel.models.NonRdfSourceDescription; 029import org.slf4j.Logger; 030 031/** 032 * Abstraction for a Fedora datastream backed by a JCR node. 033 * 034 * @author ajs6f 035 * @since Feb 21, 2013 036 */ 037public class NonRdfSourceDescriptionImpl extends FedoraResourceImpl implements NonRdfSourceDescription { 038 039 private static final Logger LOGGER = getLogger(NonRdfSourceDescriptionImpl.class); 040 041 /** 042 * The JCR node for this datastream 043 * 044 * @param n an existing {@link Node} 045 */ 046 public NonRdfSourceDescriptionImpl(final Node n) { 047 super(n); 048 } 049 050 @Override 051 public NonRdfSource getDescribedResource() { 052 return new FedoraBinaryImpl(getContentNode()); 053 } 054 055 private Node getContentNode() { 056 LOGGER.trace("Retrieved datastream content node."); 057 try { 058 return node.getNode(JCR_CONTENT); 059 } catch (final RepositoryException e) { 060 throw new RepositoryRuntimeException(e); 061 } 062 } 063 064 /** 065 * Check if the node has a fedora:datastream mixin 066 * 067 * @param node node to check 068 * @return whether the node has a fedora:datastream mixin 069 */ 070 public static boolean hasMixin(final Node node) { 071 return isNonRdfSourceDescription.apply(node); 072 } 073 074}